1e631ddbaSFerenc Havasi /* 2e631ddbaSFerenc Havasi * JFFS2 -- Journalling Flash File System, Version 2. 3e631ddbaSFerenc Havasi * 4e631ddbaSFerenc Havasi * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, 5e631ddbaSFerenc Havasi * Zoltan Sogor <weth@inf.u-szeged.hu>, 6e631ddbaSFerenc Havasi * Patrik Kluba <pajko@halom.u-szeged.hu>, 7e631ddbaSFerenc Havasi * University of Szeged, Hungary 8332a6b99SKaiGai Kohei * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com> 9e631ddbaSFerenc Havasi * 10e631ddbaSFerenc Havasi * For licensing information, see the file 'LICENCE' in this directory. 11e631ddbaSFerenc Havasi * 122bc9764cSFerenc Havasi * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $ 13e631ddbaSFerenc Havasi * 14e631ddbaSFerenc Havasi */ 15e631ddbaSFerenc Havasi 16e631ddbaSFerenc Havasi #include <linux/kernel.h> 17e631ddbaSFerenc Havasi #include <linux/sched.h> 18e631ddbaSFerenc Havasi #include <linux/slab.h> 19e631ddbaSFerenc Havasi #include <linux/mtd/mtd.h> 20e631ddbaSFerenc Havasi #include <linux/pagemap.h> 21e631ddbaSFerenc Havasi #include <linux/crc32.h> 22e631ddbaSFerenc Havasi #include <linux/compiler.h> 23e631ddbaSFerenc Havasi #include <linux/vmalloc.h> 24e631ddbaSFerenc Havasi #include "nodelist.h" 25e631ddbaSFerenc Havasi #include "debug.h" 26e631ddbaSFerenc Havasi 27e631ddbaSFerenc Havasi int jffs2_sum_init(struct jffs2_sb_info *c) 28e631ddbaSFerenc Havasi { 29e631ddbaSFerenc Havasi c->summary = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL); 30e631ddbaSFerenc Havasi 31e631ddbaSFerenc Havasi if (!c->summary) { 32e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate memory for summary information!\n"); 33e631ddbaSFerenc Havasi return -ENOMEM; 34e631ddbaSFerenc Havasi } 35e631ddbaSFerenc Havasi 36e631ddbaSFerenc Havasi memset(c->summary, 0, sizeof(struct jffs2_summary)); 37e631ddbaSFerenc Havasi 38e631ddbaSFerenc Havasi c->summary->sum_buf = vmalloc(c->sector_size); 39e631ddbaSFerenc Havasi 40e631ddbaSFerenc Havasi if (!c->summary->sum_buf) { 41e631ddbaSFerenc Havasi JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 42733802d9SArtem B. Bityutskiy kfree(c->summary); 43e631ddbaSFerenc Havasi return -ENOMEM; 44e631ddbaSFerenc Havasi } 45e631ddbaSFerenc Havasi 46d6e05edcSAndreas Mohr dbg_summary("returned successfully\n"); 47e631ddbaSFerenc Havasi 48e631ddbaSFerenc Havasi return 0; 49e631ddbaSFerenc Havasi } 50e631ddbaSFerenc Havasi 51e631ddbaSFerenc Havasi void jffs2_sum_exit(struct jffs2_sb_info *c) 52e631ddbaSFerenc Havasi { 53733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 54e631ddbaSFerenc Havasi 55e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 56e631ddbaSFerenc Havasi 57e631ddbaSFerenc Havasi vfree(c->summary->sum_buf); 58e631ddbaSFerenc Havasi c->summary->sum_buf = NULL; 59e631ddbaSFerenc Havasi 60e631ddbaSFerenc Havasi kfree(c->summary); 61e631ddbaSFerenc Havasi c->summary = NULL; 62e631ddbaSFerenc Havasi } 63e631ddbaSFerenc Havasi 64e631ddbaSFerenc Havasi static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) 65e631ddbaSFerenc Havasi { 66e631ddbaSFerenc Havasi if (!s->sum_list_head) 67e631ddbaSFerenc Havasi s->sum_list_head = (union jffs2_sum_mem *) item; 68e631ddbaSFerenc Havasi if (s->sum_list_tail) 69e631ddbaSFerenc Havasi s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; 70e631ddbaSFerenc Havasi s->sum_list_tail = (union jffs2_sum_mem *) item; 71e631ddbaSFerenc Havasi 72e631ddbaSFerenc Havasi switch (je16_to_cpu(item->u.nodetype)) { 73e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: 74e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_INODE_SIZE; 75e631ddbaSFerenc Havasi s->sum_num++; 76733802d9SArtem B. Bityutskiy dbg_summary("inode (%u) added to summary\n", 77e631ddbaSFerenc Havasi je32_to_cpu(item->i.inode)); 78e631ddbaSFerenc Havasi break; 79e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: 80e631ddbaSFerenc Havasi s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); 81e631ddbaSFerenc Havasi s->sum_num++; 82733802d9SArtem B. Bityutskiy dbg_summary("dirent (%u) added to summary\n", 83e631ddbaSFerenc Havasi je32_to_cpu(item->d.ino)); 84e631ddbaSFerenc Havasi break; 85aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 86aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: 87aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; 88aa98d7cfSKaiGai Kohei s->sum_num++; 89aa98d7cfSKaiGai Kohei dbg_summary("xattr (xid=%u, version=%u) added to summary\n", 90aa98d7cfSKaiGai Kohei je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); 91aa98d7cfSKaiGai Kohei break; 92aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: 93aa98d7cfSKaiGai Kohei s->sum_size += JFFS2_SUMMARY_XREF_SIZE; 94aa98d7cfSKaiGai Kohei s->sum_num++; 95aa98d7cfSKaiGai Kohei dbg_summary("xref added to summary\n"); 96aa98d7cfSKaiGai Kohei break; 97aa98d7cfSKaiGai Kohei #endif 98e631ddbaSFerenc Havasi default: 99e631ddbaSFerenc Havasi JFFS2_WARNING("UNKNOWN node type %u\n", 100e631ddbaSFerenc Havasi je16_to_cpu(item->u.nodetype)); 101e631ddbaSFerenc Havasi return 1; 102e631ddbaSFerenc Havasi } 103e631ddbaSFerenc Havasi return 0; 104e631ddbaSFerenc Havasi } 105e631ddbaSFerenc Havasi 106e631ddbaSFerenc Havasi 107e631ddbaSFerenc Havasi /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 108e631ddbaSFerenc Havasi 109e631ddbaSFerenc Havasi int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 110e631ddbaSFerenc Havasi { 111733802d9SArtem B. Bityutskiy dbg_summary("called with %u\n", size); 112e631ddbaSFerenc Havasi s->sum_padded += size; 113e631ddbaSFerenc Havasi return 0; 114e631ddbaSFerenc Havasi } 115e631ddbaSFerenc Havasi 116e631ddbaSFerenc Havasi int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 117e631ddbaSFerenc Havasi uint32_t ofs) 118e631ddbaSFerenc Havasi { 119e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 120e631ddbaSFerenc Havasi 121e631ddbaSFerenc Havasi if (!temp) 122e631ddbaSFerenc Havasi return -ENOMEM; 123e631ddbaSFerenc Havasi 124e631ddbaSFerenc Havasi temp->nodetype = ri->nodetype; 125e631ddbaSFerenc Havasi temp->inode = ri->ino; 126e631ddbaSFerenc Havasi temp->version = ri->version; 127e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ 128e631ddbaSFerenc Havasi temp->totlen = ri->totlen; 129e631ddbaSFerenc Havasi temp->next = NULL; 130e631ddbaSFerenc Havasi 131e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 132e631ddbaSFerenc Havasi } 133e631ddbaSFerenc Havasi 134e631ddbaSFerenc Havasi int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 135e631ddbaSFerenc Havasi uint32_t ofs) 136e631ddbaSFerenc Havasi { 137e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 138e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 139e631ddbaSFerenc Havasi 140e631ddbaSFerenc Havasi if (!temp) 141e631ddbaSFerenc Havasi return -ENOMEM; 142e631ddbaSFerenc Havasi 143e631ddbaSFerenc Havasi temp->nodetype = rd->nodetype; 144e631ddbaSFerenc Havasi temp->totlen = rd->totlen; 145e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ 146e631ddbaSFerenc Havasi temp->pino = rd->pino; 147e631ddbaSFerenc Havasi temp->version = rd->version; 148e631ddbaSFerenc Havasi temp->ino = rd->ino; 149e631ddbaSFerenc Havasi temp->nsize = rd->nsize; 150e631ddbaSFerenc Havasi temp->type = rd->type; 151e631ddbaSFerenc Havasi temp->next = NULL; 152e631ddbaSFerenc Havasi 153e631ddbaSFerenc Havasi memcpy(temp->name, rd->name, rd->nsize); 154e631ddbaSFerenc Havasi 155e631ddbaSFerenc Havasi return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 156e631ddbaSFerenc Havasi } 157e631ddbaSFerenc Havasi 158aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 159aa98d7cfSKaiGai Kohei int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) 160aa98d7cfSKaiGai Kohei { 161aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 162aa98d7cfSKaiGai Kohei 163aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 164aa98d7cfSKaiGai Kohei if (!temp) 165aa98d7cfSKaiGai Kohei return -ENOMEM; 166aa98d7cfSKaiGai Kohei 167aa98d7cfSKaiGai Kohei temp->nodetype = rx->nodetype; 168aa98d7cfSKaiGai Kohei temp->xid = rx->xid; 169aa98d7cfSKaiGai Kohei temp->version = rx->version; 170aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 171aa98d7cfSKaiGai Kohei temp->totlen = rx->totlen; 172aa98d7cfSKaiGai Kohei temp->next = NULL; 173aa98d7cfSKaiGai Kohei 174aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 175aa98d7cfSKaiGai Kohei } 176aa98d7cfSKaiGai Kohei 177aa98d7cfSKaiGai Kohei int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) 178aa98d7cfSKaiGai Kohei { 179aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 180aa98d7cfSKaiGai Kohei 181aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 182aa98d7cfSKaiGai Kohei if (!temp) 183aa98d7cfSKaiGai Kohei return -ENOMEM; 184aa98d7cfSKaiGai Kohei 185aa98d7cfSKaiGai Kohei temp->nodetype = rr->nodetype; 186aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 187aa98d7cfSKaiGai Kohei temp->next = NULL; 188aa98d7cfSKaiGai Kohei 189aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 190aa98d7cfSKaiGai Kohei } 191aa98d7cfSKaiGai Kohei #endif 192e631ddbaSFerenc Havasi /* Cleanup every collected summary information */ 193e631ddbaSFerenc Havasi 194e631ddbaSFerenc Havasi static void jffs2_sum_clean_collected(struct jffs2_summary *s) 195e631ddbaSFerenc Havasi { 196e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 197e631ddbaSFerenc Havasi 198e631ddbaSFerenc Havasi if (!s->sum_list_head) { 199733802d9SArtem B. Bityutskiy dbg_summary("already empty\n"); 200e631ddbaSFerenc Havasi } 201e631ddbaSFerenc Havasi while (s->sum_list_head) { 202e631ddbaSFerenc Havasi temp = s->sum_list_head; 203e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_head->u.next; 204e631ddbaSFerenc Havasi kfree(temp); 205e631ddbaSFerenc Havasi } 206e631ddbaSFerenc Havasi s->sum_list_tail = NULL; 207e631ddbaSFerenc Havasi s->sum_padded = 0; 208e631ddbaSFerenc Havasi s->sum_num = 0; 209e631ddbaSFerenc Havasi } 210e631ddbaSFerenc Havasi 211e631ddbaSFerenc Havasi void jffs2_sum_reset_collected(struct jffs2_summary *s) 212e631ddbaSFerenc Havasi { 213733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 214e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 215e631ddbaSFerenc Havasi s->sum_size = 0; 216e631ddbaSFerenc Havasi } 217e631ddbaSFerenc Havasi 218e631ddbaSFerenc Havasi void jffs2_sum_disable_collecting(struct jffs2_summary *s) 219e631ddbaSFerenc Havasi { 220733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 221e631ddbaSFerenc Havasi jffs2_sum_clean_collected(s); 222e631ddbaSFerenc Havasi s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 223e631ddbaSFerenc Havasi } 224e631ddbaSFerenc Havasi 225e631ddbaSFerenc Havasi int jffs2_sum_is_disabled(struct jffs2_summary *s) 226e631ddbaSFerenc Havasi { 227e631ddbaSFerenc Havasi return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 228e631ddbaSFerenc Havasi } 229e631ddbaSFerenc Havasi 230e631ddbaSFerenc Havasi /* Move the collected summary information into sb (called from scan.c) */ 231e631ddbaSFerenc Havasi 232e631ddbaSFerenc Havasi void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 233e631ddbaSFerenc Havasi { 234733802d9SArtem B. Bityutskiy dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 235e631ddbaSFerenc Havasi c->summary->sum_size, c->summary->sum_num, 236e631ddbaSFerenc Havasi s->sum_size, s->sum_num); 237e631ddbaSFerenc Havasi 238e631ddbaSFerenc Havasi c->summary->sum_size = s->sum_size; 239e631ddbaSFerenc Havasi c->summary->sum_num = s->sum_num; 240e631ddbaSFerenc Havasi c->summary->sum_padded = s->sum_padded; 241e631ddbaSFerenc Havasi c->summary->sum_list_head = s->sum_list_head; 242e631ddbaSFerenc Havasi c->summary->sum_list_tail = s->sum_list_tail; 243e631ddbaSFerenc Havasi 244e631ddbaSFerenc Havasi s->sum_list_head = s->sum_list_tail = NULL; 245e631ddbaSFerenc Havasi } 246e631ddbaSFerenc Havasi 247e631ddbaSFerenc Havasi /* Called from wbuf.c to collect writed node info */ 248e631ddbaSFerenc Havasi 249e631ddbaSFerenc Havasi int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 250e631ddbaSFerenc Havasi unsigned long count, uint32_t ofs) 251e631ddbaSFerenc Havasi { 252e631ddbaSFerenc Havasi union jffs2_node_union *node; 253e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 254e631ddbaSFerenc Havasi 25527bea327SZoltan Sogor if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { 25627bea327SZoltan Sogor dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n"); 25727bea327SZoltan Sogor return 0; 25827bea327SZoltan Sogor } 25927bea327SZoltan Sogor 260e631ddbaSFerenc Havasi node = invecs[0].iov_base; 261e631ddbaSFerenc Havasi jeb = &c->blocks[ofs / c->sector_size]; 262e631ddbaSFerenc Havasi ofs -= jeb->offset; 263e631ddbaSFerenc Havasi 264e631ddbaSFerenc Havasi switch (je16_to_cpu(node->u.nodetype)) { 265e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 266e631ddbaSFerenc Havasi struct jffs2_sum_inode_mem *temp = 267e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 268e631ddbaSFerenc Havasi 269e631ddbaSFerenc Havasi if (!temp) 270e631ddbaSFerenc Havasi goto no_mem; 271e631ddbaSFerenc Havasi 272e631ddbaSFerenc Havasi temp->nodetype = node->i.nodetype; 273e631ddbaSFerenc Havasi temp->inode = node->i.ino; 274e631ddbaSFerenc Havasi temp->version = node->i.version; 275e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 276e631ddbaSFerenc Havasi temp->totlen = node->i.totlen; 277e631ddbaSFerenc Havasi temp->next = NULL; 278e631ddbaSFerenc Havasi 279e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 280e631ddbaSFerenc Havasi } 281e631ddbaSFerenc Havasi 282e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 283e631ddbaSFerenc Havasi struct jffs2_sum_dirent_mem *temp = 284e631ddbaSFerenc Havasi kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 285e631ddbaSFerenc Havasi 286e631ddbaSFerenc Havasi if (!temp) 287e631ddbaSFerenc Havasi goto no_mem; 288e631ddbaSFerenc Havasi 289e631ddbaSFerenc Havasi temp->nodetype = node->d.nodetype; 290e631ddbaSFerenc Havasi temp->totlen = node->d.totlen; 291e631ddbaSFerenc Havasi temp->offset = cpu_to_je32(ofs); 292e631ddbaSFerenc Havasi temp->pino = node->d.pino; 293e631ddbaSFerenc Havasi temp->version = node->d.version; 294e631ddbaSFerenc Havasi temp->ino = node->d.ino; 295e631ddbaSFerenc Havasi temp->nsize = node->d.nsize; 296e631ddbaSFerenc Havasi temp->type = node->d.type; 297e631ddbaSFerenc Havasi temp->next = NULL; 298e631ddbaSFerenc Havasi 299e631ddbaSFerenc Havasi switch (count) { 300e631ddbaSFerenc Havasi case 1: 301e631ddbaSFerenc Havasi memcpy(temp->name,node->d.name,node->d.nsize); 302e631ddbaSFerenc Havasi break; 303e631ddbaSFerenc Havasi 304e631ddbaSFerenc Havasi case 2: 305e631ddbaSFerenc Havasi memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 306e631ddbaSFerenc Havasi break; 307e631ddbaSFerenc Havasi 308e631ddbaSFerenc Havasi default: 309e631ddbaSFerenc Havasi BUG(); /* impossible count value */ 310e631ddbaSFerenc Havasi break; 311e631ddbaSFerenc Havasi } 312e631ddbaSFerenc Havasi 313e631ddbaSFerenc Havasi return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 314e631ddbaSFerenc Havasi } 315aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 316aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 317aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_mem *temp; 318aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); 319aa98d7cfSKaiGai Kohei if (!temp) 320aa98d7cfSKaiGai Kohei goto no_mem; 321e631ddbaSFerenc Havasi 322aa98d7cfSKaiGai Kohei temp->nodetype = node->x.nodetype; 323aa98d7cfSKaiGai Kohei temp->xid = node->x.xid; 324aa98d7cfSKaiGai Kohei temp->version = node->x.version; 325aa98d7cfSKaiGai Kohei temp->totlen = node->x.totlen; 326aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 327aa98d7cfSKaiGai Kohei temp->next = NULL; 328aa98d7cfSKaiGai Kohei 329aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 330aa98d7cfSKaiGai Kohei } 331aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 332aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_mem *temp; 333aa98d7cfSKaiGai Kohei temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); 334aa98d7cfSKaiGai Kohei if (!temp) 335aa98d7cfSKaiGai Kohei goto no_mem; 336aa98d7cfSKaiGai Kohei temp->nodetype = node->r.nodetype; 337aa98d7cfSKaiGai Kohei temp->offset = cpu_to_je32(ofs); 338aa98d7cfSKaiGai Kohei temp->next = NULL; 339aa98d7cfSKaiGai Kohei 340aa98d7cfSKaiGai Kohei return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 341aa98d7cfSKaiGai Kohei } 342aa98d7cfSKaiGai Kohei #endif 343e631ddbaSFerenc Havasi case JFFS2_NODETYPE_PADDING: 344733802d9SArtem B. Bityutskiy dbg_summary("node PADDING\n"); 345e631ddbaSFerenc Havasi c->summary->sum_padded += je32_to_cpu(node->u.totlen); 346e631ddbaSFerenc Havasi break; 347e631ddbaSFerenc Havasi 348e631ddbaSFerenc Havasi case JFFS2_NODETYPE_CLEANMARKER: 349733802d9SArtem B. Bityutskiy dbg_summary("node CLEANMARKER\n"); 350e631ddbaSFerenc Havasi break; 351e631ddbaSFerenc Havasi 352e631ddbaSFerenc Havasi case JFFS2_NODETYPE_SUMMARY: 353733802d9SArtem B. Bityutskiy dbg_summary("node SUMMARY\n"); 354e631ddbaSFerenc Havasi break; 355e631ddbaSFerenc Havasi 356e631ddbaSFerenc Havasi default: 357e631ddbaSFerenc Havasi /* If you implement a new node type you should also implement 358e631ddbaSFerenc Havasi summary support for it or disable summary. 359e631ddbaSFerenc Havasi */ 360e631ddbaSFerenc Havasi BUG(); 361e631ddbaSFerenc Havasi break; 362e631ddbaSFerenc Havasi } 363e631ddbaSFerenc Havasi 364e631ddbaSFerenc Havasi return 0; 365e631ddbaSFerenc Havasi 366e631ddbaSFerenc Havasi no_mem: 367e631ddbaSFerenc Havasi JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 368e631ddbaSFerenc Havasi return -ENOMEM; 369e631ddbaSFerenc Havasi } 370e631ddbaSFerenc Havasi 3712f785402SDavid Woodhouse static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, 3722f785402SDavid Woodhouse struct jffs2_eraseblock *jeb, 3732f785402SDavid Woodhouse uint32_t ofs, uint32_t len, 3742f785402SDavid Woodhouse struct jffs2_inode_cache *ic) 37549f11d40SDavid Woodhouse { 37649f11d40SDavid Woodhouse /* If there was a gap, mark it dirty */ 3772f785402SDavid Woodhouse if ((ofs & ~3) > c->sector_size - jeb->free_size) { 3782f785402SDavid Woodhouse /* Ew. Summary doesn't actually tell us explicitly about dirty space */ 3792f785402SDavid Woodhouse jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); 38049f11d40SDavid Woodhouse } 38149f11d40SDavid Woodhouse 3822f785402SDavid Woodhouse return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); 38349f11d40SDavid Woodhouse } 384e631ddbaSFerenc Havasi 385e631ddbaSFerenc Havasi /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 386e631ddbaSFerenc Havasi 387e631ddbaSFerenc Havasi static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 3882bc9764cSFerenc Havasi struct jffs2_raw_summary *summary, uint32_t *pseudo_random) 389e631ddbaSFerenc Havasi { 390e631ddbaSFerenc Havasi struct jffs2_inode_cache *ic; 391e631ddbaSFerenc Havasi struct jffs2_full_dirent *fd; 392e631ddbaSFerenc Havasi void *sp; 393e631ddbaSFerenc Havasi int i, ino; 39468270995SDavid Woodhouse int err; 395e631ddbaSFerenc Havasi 396e631ddbaSFerenc Havasi sp = summary->sum; 397e631ddbaSFerenc Havasi 398e631ddbaSFerenc Havasi for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 399733802d9SArtem B. Bityutskiy dbg_summary("processing summary index %d\n", i); 400e631ddbaSFerenc Havasi 4012f785402SDavid Woodhouse /* Make sure there's a spare ref for dirty space */ 402046b8b98SDavid Woodhouse err = jffs2_prealloc_raw_node_refs(c, jeb, 2); 4032f785402SDavid Woodhouse if (err) 4042f785402SDavid Woodhouse return err; 4052f785402SDavid Woodhouse 406e631ddbaSFerenc Havasi switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 407e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 408e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *spi; 409e631ddbaSFerenc Havasi spi = sp; 410e631ddbaSFerenc Havasi 411e631ddbaSFerenc Havasi ino = je32_to_cpu(spi->inode); 412e631ddbaSFerenc Havasi 4139167e0f8SDavid Woodhouse dbg_summary("Inode at 0x%08x-0x%08x\n", 4149167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset), 4158b9e9fe8SDavid Woodhouse jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); 416e631ddbaSFerenc Havasi 417e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, ino); 418e631ddbaSFerenc Havasi if (!ic) { 419e631ddbaSFerenc Havasi JFFS2_NOTICE("scan_make_ino_cache failed\n"); 420e631ddbaSFerenc Havasi return -ENOMEM; 421e631ddbaSFerenc Havasi } 422e631ddbaSFerenc Havasi 4232f785402SDavid Woodhouse sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, 4242f785402SDavid Woodhouse PAD(je32_to_cpu(spi->totlen)), ic); 425f1f9671bSDavid Woodhouse 426f1f9671bSDavid Woodhouse *pseudo_random += je32_to_cpu(spi->version); 427e631ddbaSFerenc Havasi 428e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_INODE_SIZE; 429e631ddbaSFerenc Havasi 430e631ddbaSFerenc Havasi break; 431e631ddbaSFerenc Havasi } 432e631ddbaSFerenc Havasi 433e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 434e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *spd; 435e631ddbaSFerenc Havasi spd = sp; 436e631ddbaSFerenc Havasi 4378b9e9fe8SDavid Woodhouse dbg_summary("Dirent at 0x%08x-0x%08x\n", 4389167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset), 4399167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); 4409167e0f8SDavid Woodhouse 441e631ddbaSFerenc Havasi 442e631ddbaSFerenc Havasi fd = jffs2_alloc_full_dirent(spd->nsize+1); 4439641b784SDavid Woodhouse if (!fd) 444e631ddbaSFerenc Havasi return -ENOMEM; 445e631ddbaSFerenc Havasi 446e631ddbaSFerenc Havasi memcpy(&fd->name, spd->name, spd->nsize); 447e631ddbaSFerenc Havasi fd->name[spd->nsize] = 0; 448e631ddbaSFerenc Havasi 449e631ddbaSFerenc Havasi ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 450e631ddbaSFerenc Havasi if (!ic) { 451e631ddbaSFerenc Havasi jffs2_free_full_dirent(fd); 452e631ddbaSFerenc Havasi return -ENOMEM; 453e631ddbaSFerenc Havasi } 454e631ddbaSFerenc Havasi 4551046d880SDavid Woodhouse fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, 4562f785402SDavid Woodhouse PAD(je32_to_cpu(spd->totlen)), ic); 457e631ddbaSFerenc Havasi 458e631ddbaSFerenc Havasi fd->next = NULL; 459e631ddbaSFerenc Havasi fd->version = je32_to_cpu(spd->version); 460e631ddbaSFerenc Havasi fd->ino = je32_to_cpu(spd->ino); 461e631ddbaSFerenc Havasi fd->nhash = full_name_hash(fd->name, spd->nsize); 462e631ddbaSFerenc Havasi fd->type = spd->type; 463f1f9671bSDavid Woodhouse 464e631ddbaSFerenc Havasi jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 465e631ddbaSFerenc Havasi 466e631ddbaSFerenc Havasi *pseudo_random += je32_to_cpu(spd->version); 467e631ddbaSFerenc Havasi 468e631ddbaSFerenc Havasi sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 469e631ddbaSFerenc Havasi 470e631ddbaSFerenc Havasi break; 471e631ddbaSFerenc Havasi } 472aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 473aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 474aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 475aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *spx; 476e631ddbaSFerenc Havasi 477aa98d7cfSKaiGai Kohei spx = (struct jffs2_sum_xattr_flash *)sp; 4789167e0f8SDavid Woodhouse dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 47949f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset), 4809167e0f8SDavid Woodhouse jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), 481aa98d7cfSKaiGai Kohei je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); 4822f785402SDavid Woodhouse 483aa98d7cfSKaiGai Kohei xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), 484aa98d7cfSKaiGai Kohei je32_to_cpu(spx->version)); 485c9f700f8SKaiGai Kohei if (IS_ERR(xd)) 486aa98d7cfSKaiGai Kohei return PTR_ERR(xd); 487c9f700f8SKaiGai Kohei if (xd->version > je32_to_cpu(spx->version)) { 488c9f700f8SKaiGai Kohei /* node is not the newest one */ 489c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw 490c9f700f8SKaiGai Kohei = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 4912f785402SDavid Woodhouse PAD(je32_to_cpu(spx->totlen)), NULL); 492c9f700f8SKaiGai Kohei raw->next_in_ino = xd->node->next_in_ino; 493c9f700f8SKaiGai Kohei xd->node->next_in_ino = raw; 494c9f700f8SKaiGai Kohei } else { 495c9f700f8SKaiGai Kohei xd->version = je32_to_cpu(spx->version); 496c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, 497c9f700f8SKaiGai Kohei PAD(je32_to_cpu(spx->totlen)), (void *)xd); 498c9f700f8SKaiGai Kohei } 499aa98d7cfSKaiGai Kohei *pseudo_random += je32_to_cpu(spx->xid); 500aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XATTR_SIZE; 501aa98d7cfSKaiGai Kohei 502aa98d7cfSKaiGai Kohei break; 503aa98d7cfSKaiGai Kohei } 504aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 505aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 506aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *spr; 507aa98d7cfSKaiGai Kohei 508aa98d7cfSKaiGai Kohei spr = (struct jffs2_sum_xref_flash *)sp; 5099167e0f8SDavid Woodhouse dbg_summary("xref at %#08x-%#08x\n", 51049f11d40SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset), 5119bfeb691SDavid Woodhouse jeb->offset + je32_to_cpu(spr->offset) + 5129bfeb691SDavid Woodhouse (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); 5139167e0f8SDavid Woodhouse 514aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 515aa98d7cfSKaiGai Kohei if (!ref) { 516aa98d7cfSKaiGai Kohei JFFS2_NOTICE("allocation of xattr_datum failed\n"); 517aa98d7cfSKaiGai Kohei return -ENOMEM; 518aa98d7cfSKaiGai Kohei } 5198f2b6f49SKaiGai Kohei ref->next = c->xref_temp; 5208f2b6f49SKaiGai Kohei c->xref_temp = ref; 521aa98d7cfSKaiGai Kohei 522c9f700f8SKaiGai Kohei sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, 523c9f700f8SKaiGai Kohei PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); 524aa98d7cfSKaiGai Kohei 5252f785402SDavid Woodhouse *pseudo_random += ref->node->flash_offset; 526aa98d7cfSKaiGai Kohei sp += JFFS2_SUMMARY_XREF_SIZE; 527aa98d7cfSKaiGai Kohei 528aa98d7cfSKaiGai Kohei break; 529aa98d7cfSKaiGai Kohei } 530aa98d7cfSKaiGai Kohei #endif 531e631ddbaSFerenc Havasi default : { 5327807ef7bSDavid Woodhouse uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); 5337807ef7bSDavid Woodhouse JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); 5347807ef7bSDavid Woodhouse if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) 535e631ddbaSFerenc Havasi return -EIO; 5367807ef7bSDavid Woodhouse 5377807ef7bSDavid Woodhouse /* For compatible node types, just fall back to the full scan */ 5387807ef7bSDavid Woodhouse c->wasted_size -= jeb->wasted_size; 5397807ef7bSDavid Woodhouse c->free_size += c->sector_size - jeb->free_size; 5407807ef7bSDavid Woodhouse c->used_size -= jeb->used_size; 5417807ef7bSDavid Woodhouse c->dirty_size -= jeb->dirty_size; 5427807ef7bSDavid Woodhouse jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; 5437807ef7bSDavid Woodhouse jeb->free_size = c->sector_size; 5447807ef7bSDavid Woodhouse 545c38c1b61SDavid Woodhouse jffs2_free_jeb_node_refs(c, jeb); 5467807ef7bSDavid Woodhouse return -ENOTRECOVERABLE; 547e631ddbaSFerenc Havasi } 548e631ddbaSFerenc Havasi } 549e631ddbaSFerenc Havasi } 550e631ddbaSFerenc Havasi return 0; 551e631ddbaSFerenc Havasi } 552e631ddbaSFerenc Havasi 553e631ddbaSFerenc Havasi /* Process the summary node - called from jffs2_scan_eraseblock() */ 554e631ddbaSFerenc Havasi int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 5559641b784SDavid Woodhouse struct jffs2_raw_summary *summary, uint32_t sumsize, 5569641b784SDavid Woodhouse uint32_t *pseudo_random) 557e631ddbaSFerenc Havasi { 558e631ddbaSFerenc Havasi struct jffs2_unknown_node crcnode; 5599641b784SDavid Woodhouse int ret, ofs; 560e631ddbaSFerenc Havasi uint32_t crc; 561e631ddbaSFerenc Havasi 56249f11d40SDavid Woodhouse ofs = c->sector_size - sumsize; 563e631ddbaSFerenc Havasi 564733802d9SArtem B. Bityutskiy dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 56549f11d40SDavid Woodhouse jeb->offset, jeb->offset + ofs, sumsize); 566e631ddbaSFerenc Havasi 567e631ddbaSFerenc Havasi /* OK, now check for node validity and CRC */ 568e631ddbaSFerenc Havasi crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 569e631ddbaSFerenc Havasi crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 570e631ddbaSFerenc Havasi crcnode.totlen = summary->totlen; 571e631ddbaSFerenc Havasi crc = crc32(0, &crcnode, sizeof(crcnode)-4); 572e631ddbaSFerenc Havasi 573e631ddbaSFerenc Havasi if (je32_to_cpu(summary->hdr_crc) != crc) { 574733802d9SArtem B. Bityutskiy dbg_summary("Summary node header is corrupt (bad CRC or " 575e631ddbaSFerenc Havasi "no summary at all)\n"); 576e631ddbaSFerenc Havasi goto crc_err; 577e631ddbaSFerenc Havasi } 578e631ddbaSFerenc Havasi 579e631ddbaSFerenc Havasi if (je32_to_cpu(summary->totlen) != sumsize) { 580733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); 581e631ddbaSFerenc Havasi goto crc_err; 582e631ddbaSFerenc Havasi } 583e631ddbaSFerenc Havasi 5842bc9764cSFerenc Havasi crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); 585e631ddbaSFerenc Havasi 586e631ddbaSFerenc Havasi if (je32_to_cpu(summary->node_crc) != crc) { 587733802d9SArtem B. Bityutskiy dbg_summary("Summary node is corrupt (bad CRC)\n"); 588e631ddbaSFerenc Havasi goto crc_err; 589e631ddbaSFerenc Havasi } 590e631ddbaSFerenc Havasi 5912bc9764cSFerenc Havasi crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); 592e631ddbaSFerenc Havasi 593e631ddbaSFerenc Havasi if (je32_to_cpu(summary->sum_crc) != crc) { 594733802d9SArtem B. Bityutskiy dbg_summary("Summary node data is corrupt (bad CRC)\n"); 595e631ddbaSFerenc Havasi goto crc_err; 596e631ddbaSFerenc Havasi } 597e631ddbaSFerenc Havasi 598e631ddbaSFerenc Havasi if ( je32_to_cpu(summary->cln_mkr) ) { 599e631ddbaSFerenc Havasi 600733802d9SArtem B. Bityutskiy dbg_summary("Summary : CLEANMARKER node \n"); 601e631ddbaSFerenc Havasi 602098a1981SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); 603098a1981SDavid Woodhouse if (ret) 604098a1981SDavid Woodhouse return ret; 605098a1981SDavid Woodhouse 606e631ddbaSFerenc Havasi if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 607733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 608e631ddbaSFerenc Havasi je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 609098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 610098a1981SDavid Woodhouse return ret; 611e631ddbaSFerenc Havasi } else if (jeb->first_node) { 612733802d9SArtem B. Bityutskiy dbg_summary("CLEANMARKER node not first node in block " 613e631ddbaSFerenc Havasi "(0x%08x)\n", jeb->offset); 614098a1981SDavid Woodhouse if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) 615098a1981SDavid Woodhouse return ret; 616e631ddbaSFerenc Havasi } else { 6172f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, 6182f785402SDavid Woodhouse je32_to_cpu(summary->cln_mkr), NULL); 619e631ddbaSFerenc Havasi } 620e631ddbaSFerenc Havasi } 621e631ddbaSFerenc Havasi 622e631ddbaSFerenc Havasi ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 6237807ef7bSDavid Woodhouse /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full 6247807ef7bSDavid Woodhouse scan of this eraseblock. So return zero */ 6257807ef7bSDavid Woodhouse if (ret == -ENOTRECOVERABLE) 6267807ef7bSDavid Woodhouse return 0; 627e631ddbaSFerenc Havasi if (ret) 6287807ef7bSDavid Woodhouse return ret; /* real error */ 629e631ddbaSFerenc Havasi 630e631ddbaSFerenc Havasi /* for PARANOIA_CHECK */ 631046b8b98SDavid Woodhouse ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); 6322f785402SDavid Woodhouse if (ret) 6332f785402SDavid Woodhouse return ret; 634e631ddbaSFerenc Havasi 635f61579c3SDavid Woodhouse sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); 636e631ddbaSFerenc Havasi 63749f11d40SDavid Woodhouse if (unlikely(jeb->free_size)) { 63849f11d40SDavid Woodhouse JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", 63949f11d40SDavid Woodhouse jeb->free_size, jeb->offset); 640e631ddbaSFerenc Havasi jeb->wasted_size += jeb->free_size; 641e631ddbaSFerenc Havasi c->wasted_size += jeb->free_size; 642e631ddbaSFerenc Havasi c->free_size -= jeb->free_size; 643e631ddbaSFerenc Havasi jeb->free_size = 0; 64449f11d40SDavid Woodhouse } 645e631ddbaSFerenc Havasi 646e631ddbaSFerenc Havasi return jffs2_scan_classify_jeb(c, jeb); 647e631ddbaSFerenc Havasi 648e631ddbaSFerenc Havasi crc_err: 649e631ddbaSFerenc Havasi JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 650e631ddbaSFerenc Havasi 651e631ddbaSFerenc Havasi return 0; 652e631ddbaSFerenc Havasi } 653e631ddbaSFerenc Havasi 654e631ddbaSFerenc Havasi /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 655e631ddbaSFerenc Havasi 656e631ddbaSFerenc Havasi static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 657e631ddbaSFerenc Havasi uint32_t infosize, uint32_t datasize, int padsize) 658e631ddbaSFerenc Havasi { 6592bc9764cSFerenc Havasi struct jffs2_raw_summary isum; 660e631ddbaSFerenc Havasi union jffs2_sum_mem *temp; 661e631ddbaSFerenc Havasi struct jffs2_sum_marker *sm; 662e631ddbaSFerenc Havasi struct kvec vecs[2]; 6632f785402SDavid Woodhouse uint32_t sum_ofs; 664e631ddbaSFerenc Havasi void *wpage; 665e631ddbaSFerenc Havasi int ret; 666e631ddbaSFerenc Havasi size_t retlen; 667e631ddbaSFerenc Havasi 668e631ddbaSFerenc Havasi memset(c->summary->sum_buf, 0xff, datasize); 669e631ddbaSFerenc Havasi memset(&isum, 0, sizeof(isum)); 670e631ddbaSFerenc Havasi 671e631ddbaSFerenc Havasi isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 672e631ddbaSFerenc Havasi isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 673e631ddbaSFerenc Havasi isum.totlen = cpu_to_je32(infosize); 674e631ddbaSFerenc Havasi isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 675e631ddbaSFerenc Havasi isum.padded = cpu_to_je32(c->summary->sum_padded); 676e631ddbaSFerenc Havasi isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 677e631ddbaSFerenc Havasi isum.sum_num = cpu_to_je32(c->summary->sum_num); 678e631ddbaSFerenc Havasi wpage = c->summary->sum_buf; 679e631ddbaSFerenc Havasi 680e631ddbaSFerenc Havasi while (c->summary->sum_num) { 68120ffdcb0SJesper Juhl temp = c->summary->sum_list_head; 682e631ddbaSFerenc Havasi 68320ffdcb0SJesper Juhl switch (je16_to_cpu(temp->u.nodetype)) { 684e631ddbaSFerenc Havasi case JFFS2_NODETYPE_INODE: { 685e631ddbaSFerenc Havasi struct jffs2_sum_inode_flash *sino_ptr = wpage; 686e631ddbaSFerenc Havasi 68720ffdcb0SJesper Juhl sino_ptr->nodetype = temp->i.nodetype; 68820ffdcb0SJesper Juhl sino_ptr->inode = temp->i.inode; 68920ffdcb0SJesper Juhl sino_ptr->version = temp->i.version; 69020ffdcb0SJesper Juhl sino_ptr->offset = temp->i.offset; 69120ffdcb0SJesper Juhl sino_ptr->totlen = temp->i.totlen; 692e631ddbaSFerenc Havasi 693e631ddbaSFerenc Havasi wpage += JFFS2_SUMMARY_INODE_SIZE; 694e631ddbaSFerenc Havasi 695e631ddbaSFerenc Havasi break; 696e631ddbaSFerenc Havasi } 697e631ddbaSFerenc Havasi 698e631ddbaSFerenc Havasi case JFFS2_NODETYPE_DIRENT: { 699e631ddbaSFerenc Havasi struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 700e631ddbaSFerenc Havasi 70120ffdcb0SJesper Juhl sdrnt_ptr->nodetype = temp->d.nodetype; 70220ffdcb0SJesper Juhl sdrnt_ptr->totlen = temp->d.totlen; 70320ffdcb0SJesper Juhl sdrnt_ptr->offset = temp->d.offset; 70420ffdcb0SJesper Juhl sdrnt_ptr->pino = temp->d.pino; 70520ffdcb0SJesper Juhl sdrnt_ptr->version = temp->d.version; 70620ffdcb0SJesper Juhl sdrnt_ptr->ino = temp->d.ino; 70720ffdcb0SJesper Juhl sdrnt_ptr->nsize = temp->d.nsize; 70820ffdcb0SJesper Juhl sdrnt_ptr->type = temp->d.type; 709e631ddbaSFerenc Havasi 71020ffdcb0SJesper Juhl memcpy(sdrnt_ptr->name, temp->d.name, 71120ffdcb0SJesper Juhl temp->d.nsize); 712e631ddbaSFerenc Havasi 71320ffdcb0SJesper Juhl wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); 714e631ddbaSFerenc Havasi 715e631ddbaSFerenc Havasi break; 716e631ddbaSFerenc Havasi } 717aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_XATTR 718aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XATTR: { 719aa98d7cfSKaiGai Kohei struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; 720e631ddbaSFerenc Havasi 721aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 722aa98d7cfSKaiGai Kohei sxattr_ptr->nodetype = temp->x.nodetype; 723aa98d7cfSKaiGai Kohei sxattr_ptr->xid = temp->x.xid; 724aa98d7cfSKaiGai Kohei sxattr_ptr->version = temp->x.version; 725aa98d7cfSKaiGai Kohei sxattr_ptr->offset = temp->x.offset; 726aa98d7cfSKaiGai Kohei sxattr_ptr->totlen = temp->x.totlen; 727aa98d7cfSKaiGai Kohei 728aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XATTR_SIZE; 729aa98d7cfSKaiGai Kohei break; 730aa98d7cfSKaiGai Kohei } 731aa98d7cfSKaiGai Kohei case JFFS2_NODETYPE_XREF: { 732aa98d7cfSKaiGai Kohei struct jffs2_sum_xref_flash *sxref_ptr = wpage; 733aa98d7cfSKaiGai Kohei 734aa98d7cfSKaiGai Kohei temp = c->summary->sum_list_head; 735aa98d7cfSKaiGai Kohei sxref_ptr->nodetype = temp->r.nodetype; 736aa98d7cfSKaiGai Kohei sxref_ptr->offset = temp->r.offset; 737aa98d7cfSKaiGai Kohei 738aa98d7cfSKaiGai Kohei wpage += JFFS2_SUMMARY_XREF_SIZE; 739aa98d7cfSKaiGai Kohei break; 740aa98d7cfSKaiGai Kohei } 741aa98d7cfSKaiGai Kohei #endif 742e631ddbaSFerenc Havasi default : { 7436171586aSDavid Woodhouse if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) 7446171586aSDavid Woodhouse == JFFS2_FEATURE_RWCOMPAT_COPY) { 7456171586aSDavid Woodhouse dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", 7466171586aSDavid Woodhouse je16_to_cpu(temp->u.nodetype)); 7476171586aSDavid Woodhouse jffs2_sum_disable_collecting(c->summary); 7486171586aSDavid Woodhouse } else { 749e631ddbaSFerenc Havasi BUG(); /* unknown node in summary information */ 750e631ddbaSFerenc Havasi } 751e631ddbaSFerenc Havasi } 7526171586aSDavid Woodhouse } 753e631ddbaSFerenc Havasi 75420ffdcb0SJesper Juhl c->summary->sum_list_head = temp->u.next; 755e631ddbaSFerenc Havasi kfree(temp); 756e631ddbaSFerenc Havasi 757e631ddbaSFerenc Havasi c->summary->sum_num--; 758e631ddbaSFerenc Havasi } 759e631ddbaSFerenc Havasi 760e631ddbaSFerenc Havasi jffs2_sum_reset_collected(c->summary); 761e631ddbaSFerenc Havasi 762e631ddbaSFerenc Havasi wpage += padsize; 763e631ddbaSFerenc Havasi 764e631ddbaSFerenc Havasi sm = wpage; 765e631ddbaSFerenc Havasi sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 766e631ddbaSFerenc Havasi sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 767e631ddbaSFerenc Havasi 768e631ddbaSFerenc Havasi isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 769e631ddbaSFerenc Havasi isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 770e631ddbaSFerenc Havasi 771e631ddbaSFerenc Havasi vecs[0].iov_base = &isum; 772e631ddbaSFerenc Havasi vecs[0].iov_len = sizeof(isum); 773e631ddbaSFerenc Havasi vecs[1].iov_base = c->summary->sum_buf; 774e631ddbaSFerenc Havasi vecs[1].iov_len = datasize; 775e631ddbaSFerenc Havasi 7762f785402SDavid Woodhouse sum_ofs = jeb->offset + c->sector_size - jeb->free_size; 777e631ddbaSFerenc Havasi 7782f785402SDavid Woodhouse dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", 7792f785402SDavid Woodhouse sum_ofs); 7802f785402SDavid Woodhouse 7812f785402SDavid Woodhouse ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); 782e631ddbaSFerenc Havasi 783e631ddbaSFerenc Havasi if (ret || (retlen != infosize)) { 784010b06d6SDavid Woodhouse 785c41ff6e5SDavid Woodhouse JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", 7862f785402SDavid Woodhouse infosize, sum_ofs, ret, retlen); 787e631ddbaSFerenc Havasi 7889bfeb691SDavid Woodhouse if (retlen) { 789010b06d6SDavid Woodhouse /* Waste remaining space */ 790010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 7912f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); 7922f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 7939bfeb691SDavid Woodhouse } 794010b06d6SDavid Woodhouse 795e631ddbaSFerenc Havasi c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 796e631ddbaSFerenc Havasi 7972f785402SDavid Woodhouse return 0; 798e631ddbaSFerenc Havasi } 799e631ddbaSFerenc Havasi 800010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8012f785402SDavid Woodhouse jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); 8022f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 803010b06d6SDavid Woodhouse 804e631ddbaSFerenc Havasi return 0; 805e631ddbaSFerenc Havasi } 806e631ddbaSFerenc Havasi 807e631ddbaSFerenc Havasi /* Write out summary information - called from jffs2_do_reserve_space */ 808e631ddbaSFerenc Havasi 809e631ddbaSFerenc Havasi int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 810e631ddbaSFerenc Havasi { 8112f785402SDavid Woodhouse int datasize, infosize, padsize; 812e631ddbaSFerenc Havasi struct jffs2_eraseblock *jeb; 8132f785402SDavid Woodhouse int ret; 814e631ddbaSFerenc Havasi 815733802d9SArtem B. Bityutskiy dbg_summary("called\n"); 816e631ddbaSFerenc Havasi 8172f785402SDavid Woodhouse spin_unlock(&c->erase_completion_lock); 8182f785402SDavid Woodhouse 819e631ddbaSFerenc Havasi jeb = c->nextblock; 820046b8b98SDavid Woodhouse jffs2_prealloc_raw_node_refs(c, jeb, 1); 821e631ddbaSFerenc Havasi 822e631ddbaSFerenc Havasi if (!c->summary->sum_num || !c->summary->sum_list_head) { 823e631ddbaSFerenc Havasi JFFS2_WARNING("Empty summary info!!!\n"); 824e631ddbaSFerenc Havasi BUG(); 825e631ddbaSFerenc Havasi } 826e631ddbaSFerenc Havasi 827e631ddbaSFerenc Havasi datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 8282bc9764cSFerenc Havasi infosize = sizeof(struct jffs2_raw_summary) + datasize; 829e631ddbaSFerenc Havasi padsize = jeb->free_size - infosize; 830e631ddbaSFerenc Havasi infosize += padsize; 831e631ddbaSFerenc Havasi datasize += padsize; 832e631ddbaSFerenc Havasi 833e631ddbaSFerenc Havasi /* Is there enough space for summary? */ 834e631ddbaSFerenc Havasi if (padsize < 0) { 835e631ddbaSFerenc Havasi /* don't try to write out summary for this jeb */ 836e631ddbaSFerenc Havasi jffs2_sum_disable_collecting(c->summary); 837e631ddbaSFerenc Havasi 838e631ddbaSFerenc Havasi JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); 8399bfeb691SDavid Woodhouse spin_lock(&c->erase_completion_lock); 840e631ddbaSFerenc Havasi return 0; 841e631ddbaSFerenc Havasi } 842e631ddbaSFerenc Havasi 843e631ddbaSFerenc Havasi ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 844010b06d6SDavid Woodhouse spin_lock(&c->erase_completion_lock); 8452f785402SDavid Woodhouse return ret; 846e631ddbaSFerenc Havasi } 847